| Asian corn borer, Ostrinia furnacalis（Guenée）, is the major insect pest of corn in China, whichinfluence the yield and quality of corn. In addition to corn, the Asian corn borer also attack many othercrops and weeds. In order to make clear the host plant species of the Asian corn borer, this article testedwhether the Asian corn borer could complete life history on tested plants by non-choice test in field andfeeding test in laboratory. And the adult oviposition and larval feeding preferences of the Asian cornborer on different plants were also carried out in greenhouse and laboratory, respectively. These testsclarified the selection mechanism of the Asian corn borer on host plants. The main results are asfollows:1. Study on the host species of O. furnacalis in fieldTwenty species host plants were selected from experimental plants by non-choice caged test infield. These plants belong to Gramineae, Leguminosae, Asteraceae, Polygonaceae, Moraceae,Malvaceae. O. furnacalis can complete life history on all Gramineae except barley, Hordeum vulgare.This showed that Gramineae was the main host plants of O. furnacalis. The number of O. furnacalisfirst-generation adults emerged from Polygonum lapathifolium was highest, and significantly higherthan other plants. The number of holes and tunnel length on P. lapathifolium was most, and significantlyhigher than other plants. The number of second generation of O. furnacalis on P. lapathifolium wassignificantly higher than other plants except corn, Zea mays. P. lapathifolium was the most suitable hostplant. The other suitable host plants include Z. mays, millet (Setaria italica), jobstears (Coixlacroyma-jobi), green bristlegrass (Setaria viridis), scandent hop (Humulus scandens), cocklebur(Xanthium sibiricum), Abutilon (Abutilon theophrasti).2. Effects of different plants on the development and fecundity of O. furnacalisResult from the feeding experiments of O. furnacalis by different plants showed that O.furnacalis can complete life history on twenty five plants. Compared with field test, O. furnacalis cancomplete life history on soybean (Glycine max), adzuki bean (Vigna angularis), pea (Pisum sativum),broad bean (Vicia faba), peanut (Arachis hypogaea) from Leguminosae, castor (Ricinus communis)from Euphorbiaceae, and cabbage (Brassica oleracea) from Brassicaceae.Effects of different plants on the development and fecundity of O. furnacalis were clarified fromthe feeding experiments. The study showed that O. furnacalis feeding on different plants weresignificantly different in larval period, pupa period, adult period, pupa weight and total eggs per female.The larval survival rate of O. furnacalis fed by sunflower (Helianthus annuus) was highest,72.92%, which was the double of corn. The larval period of O. furnacalis feeding on adzuki bean was shortest.The pupal weight and pupal survival rate of O.furnacalis fed by bean (Phaseolus vulgaris) was highest.The pupa period of O. furnacalis feeding on castor was shortest. The adult period of O. furnacalisfeeding on sugarcane (Saccharum officinarum) was longest. The total eggs per female of O. furnacalisfeeding on mungbean (Vigna radiata) were highest.Establishment of life table for experimental population of O. furnacalis on different host plants showed that the growth speed of O. furnacalis feeding on sunflower was fastest, followed by corn. Thesunflower was the most suitable host plant of O. furnacalis in laboratory test.3. Adult oviposition and larval feeding preferences of O. furnacalis on different host plantsThe laboratory choice test clarified the adult oviposition and larval feeding preferences of O.furnacalis, and revealed the relationship between adult oviposition preference and larval feedingpreference. The result showed that in the adult oviposition test the order of the egg production of O.furnacalis on different plants ranked as H. scandens, P. lapathifolium, Z. mays, H. annuus, A.theophrasti, and P. vulgaris. The number of egg masses and eggs of O. furnacalis on H. scandens aresignificantly higher than on other plants except P. lapathifolium. The number of egg masses and eggs ofO. furnacalis on P. lapathifolium is next below H. scandens. In all cages O. furnacalis only lay one eggmass. Feeding preference of O. furnacalis larvae at different instars on different plants are different.Newly-hatched larvae and3rd-instar larvae of O. furnacalis prefer to feed on P. vulgaris and P.lapathifolium, followed by H. scandens, H. annuus, and A. theophrasti, and exhibit lowest selectivity toZ. mays. The5th-instar larvae of O. furnacalis are not obvious feeding preference to the six plants. |
PDF Full Text Request